import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class T1 {
    public static List<Character> func(String str1,String str2){
        List<Character> list=new ArrayList<>();
        for (int i = 0; i < str1.length(); i++) {
            char ch=str1.charAt(i);
            if (!str2.contains(ch+"")){
                list.add(ch);
            }
        }
        return list;
    }
    public static void main(String[] args) {
        List <Character> ret =func("welcome to cvte","come");
        for (char ch:ret) {
            System.out.print(ch);
        }

    }
}
